Auth bypass in Discourse
CVE-2022-39356
Discourse is a platform for community discussion. Users who receive an invitation link that is not scoped to a single email address can enter any non-admin user's email and gain access to their account when accepting the invitation. All users should upgrade to the latest version. A workaround is temporarily disabling invitations with `SiteSetting.max_invites_per_day = 0` or scope them to individual email addresses.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.9 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:L.
EPSS exploit prediction
EPSS: 0.006 (47.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 47.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- Discourse — versions <= 2.9.0.beta10, <= 2.8.9, 2.9.0
Weakness classification (CWE)
References
- github.com/discourse/discourse/security/advisories/GHSA-x8w7-rwmr-w278 (Third Party Advisory)
- github.com/discourse/discourse/pull/18817 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2022-39356?
- CVE-2022-39356 is a high-severity vulnerability in Discourse, classified under Improper Authorization. CVSS score: 8.9/10. Published 2022-11-02.
- How severe is CVE-2022-39356?
- High severity. CVSS v3 base score is 8.9 out of 10.